42539841 has 48 divisors (see below), whose sum is σ = 67891200. Its totient is φ = 25575264.

The previous prime is 42539821. The next prime is 42539851. The reversal of 42539841 is 14893524.

42539841 is a `hidden beast` number, since 42 + 539 + 84 + 1 = 666.

It is not a de Polignac number, because 42539841 - 2⁷ = 42539713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42539796 and 42539805.

It is not an unprimeable number, because it can be changed into a prime (42539821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 538440 + ... + 538518.

It is an arithmetic number, because the mean of its divisors is an integer number (1414400).

Almost surely, 2^42539841 is an apocalyptic number.

It is an amenable number.

42539841 is a deficient number, since it is larger than the sum of its proper divisors (25351359).

42539841 is a wasteful number, since it uses less digits than its factorization.

42539841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 215 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 42539841 is about 6522.2573546281. The cubic root of 42539841 is about 349.0856159494.

The spelling of 42539841 in words is "forty-two million, five hundred thirty-nine thousand, eight hundred forty-one".